All names: LP 639-13, SDSS J220253.74+023739.8, WDJ220253.65+023741.52, TIC 293020756, J2202+0237, Gaia DR2 2683452758602312192, USNO-B1.0 0926-00754357, NLTT 52771, Gaia EDR3 2683452758602312192, WDJ220253.65+023741.53, 2MASS J22025365+0237413, LSPM J2202+0237, Gaia DR3 2683452758602312192, GALEX J220253.6+023741
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | Tremblay et al. 2020 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 02 53.83 (0.08) | 22 02 53.82 (0.1) | 22 02 53.82 | 22 02 53.83 | 22 02 53.65 (0.08) | 22 02 53.82 | |||||||
| Declination | 02 37 38.40 (0.08) | 02 37 38.49 (0.1) | 02 37 38.49 | 02 37 38.40 | 02 37 41.53 (0.08) | 02 37 38.49 | |||||||
| Spectral type | DA | DA | DA | DA | DA | DA | DA | ||||||
| Effective temperature | [K] | 5844.0 (15) | 5776.0 (59) | 5825.0 (13) | 5747.0 (54) | 5750.0 (50) | 5900.0 (46) | ||||||
| log(g) | [cgs] | 8.23 (0.005) | 8.20 (0.03) | 8.22 (0.007) | 8.20 (0.03) | 8.20 (0.04) | 8.25 (0.01) | ||||||
| Mass | [M☉] | 0.732 (0.005) | 0.712 (0.02) | 0.727 (0.007) | 0.748 (0.01) | ||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 4.3900 | |||||||||||
| log(H/He) | |||||||||||||
| log(C/He) | |||||||||||||
| log(Ca/He) | |||||||||||||
| log(Ca/H) | |||||||||||||
| log(C/H) | |||||||||||||
| log(N/H) | |||||||||||||
| log(O/H) | |||||||||||||
| log(Na/H) | |||||||||||||
| log(Mg/H) | |||||||||||||
| log(Al/H) | |||||||||||||
| log(Si/H) | |||||||||||||
| log(P/H) | |||||||||||||
| log(S/H) | |||||||||||||
| log(Sc/H) | |||||||||||||
| log(Ti/H) | |||||||||||||
| log(Cr/H) | |||||||||||||
| log(Mn/H) | |||||||||||||
| log(Fe/H) | |||||||||||||
| log(Ni/H) | |||||||||||||
| Parallax | [mas] | 33.36 (0.1) | 33.36 (0.1) | 33.47 (0.2) | 33.47 (0.2) | 33.47 (0.2) | 33.36 | 33.36 (0.1) | 33.47 (0.2) | ||||
| Distance | [pc] | 29.97 (0.1) | 29.98 (0.1) | 29.88 (0.2) | 29.88 (0.2) | 29.88 (0.2) | 29.97 | 29.97 (0.1) | 29.88 (0.2) | ||||
| Composition | H | H | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 165.1011778 (0.1) | 165.1003994 (0.2) | 165.101 (0.1) | 165.1003994 | ||||||||
| Proper motion (declination) | [mas/yr] | -195.7608216 (0.09) | -195.7829243 (0.2) | -195.761 (0.09) | -195.7829243 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 17.60 | ||||||||||||
| V magnitude | |||||||||||||
| R magnitude | 15.60 | ||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 15.74 (0.06) | 15.74 (0.06) | |||||||||||
| H magnitude | 15.57 (0.08) | 15.57 (0.08) | |||||||||||
| K magnitude | 15.47 (0.2) | 15.47 (0.2) | |||||||||||
| u magnitude | 18.24 (0.01) | 18.24 (0.01) | 18.24 (0.01) | ||||||||||
| g magnitude | 17.27 (0.005) | 17.27 (0.005) | |||||||||||
| r magnitude | 16.84 (0.005) | 16.84 (0.005) | |||||||||||
| i magnitude | 16.67 (0.006) | 16.67 (0.006) | |||||||||||
| z magnitude | 16.61 (0.009) | 16.61 (0.009) | |||||||||||
| G magnitude | 16.85 (0.007) | 16.87 | 16.87 | 16.85 | 16.85 (0.003) | 16.87 | |||||||
| BP magnitude | 17.18 (0.007) | 17.19 | 17.19 | ||||||||||
| RP magnitude | 16.35 (0.007) | 16.36 | 16.36 | ||||||||||
| Pan g magnitude | 17.22 (0.003) | 17.22 (0.004) | |||||||||||
| Pan r magnitude | 16.84 (0.003) | 16.84 (0.003) | |||||||||||
| Pan i magnitude | 16.69 (0.002) | 16.69 (0.002) | |||||||||||
| Pan z magnitude | 16.67 (0.003) | 16.67 (0.003) | |||||||||||
| Pan y magnitude | 16.66 (0.008) | 16.66 (0.007) | |||||||||||
| E(B-V) | 0.001 | ||||||||||||
* Constant surface field
Spectra without link are available upon request
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.